Set up using AMC AB15A100 drives, brushed DC motor Prototrak Plus with Encoders

STATUS LEDS
Six status LEDs are provided for power and field I/O operation monitoring. These
LEDs are listed here:
LED COLOR LOCATION FUNCTION
CR1 Yellow Upper left 5V monitor
CR3 Yellow Upper right Field voltage monitor
CR6 Yellow Lower middle +16V monitor
CR7 Yellow Lower middle -12V monitor
CR15 Green Lower right Field I/O activity
CR16 Red Lower right Field I/O fault
In normal operation CR1 through CR7 must always be on. At power-up, CR15
should be off and CR16 on. The red LED CR16 indicates a watchdog fault, which is
expected before host communications are established. Once running, CR15 should blink
at about 1 Hz for a 1 KHz update rate, and CR16 should be off. Note: CR15 and CR16 are
only present in revision B or greater 7I77 cards

How many yellow LEDS are there?

andypugh, Thanks!!
It appears that CR 1, 2, 3, 6, 7 = yellow; 15, = off (no light) & 16 = Red
I saw no LED blinking, as soon as LinuxCnc is booted up the lights come on.


Many thanks for all the help.

Edit: I have reached out to my A-M-C engineer, seeking his thoughts & thinking, he says now is the time to order a new 7i77 card. Looking for 2nd opinion, please.

The lights (other than CR15) must be on _before_ LinuxCNC is started

PCW, Many thanks for your help. The LEDs stay on, as stated. The screen will not go to the Linuxcnc (logo screen) only to errors as listed.

When the 1st wiring diagram (in this post) & use it as is, the DRO will work & went to DRO screen.

Now, TB-5, has no connection to anything on Pins 1 & 2. No logo screen, just error screen as per diagram on this post (04 May 2022 19:10 - 06 May 2022 18:43 #241996). I have tried the GND to encoder TB-3 GND to Pin11 on AMC SW-1.

Ready need 2nd opinion about new 7i77 card?

Many thanks for all the great help, I am grateful for the help.

Edit: I have checked continuity on the DB25 cable, all straight through, all tested good.

If the 7i77 card is bad, what downside to try TB5 pin1 (ENAO-) to AMC SW-1 pin 2 (Signal GND) and TB5 pin2 (ENAO+) to AMC SW-1 pin 9 (inhibit/enable) or after this testing it shows no need to go further.

There is no point in connecting any 7I77 pin to the machine
if you don not have communication (The ENA pins will not function)